Mn^2+ + 2e^- rightarrow Mn E degree = -1.03 V Cu^2+ + 2e^- rightarrow Cu E degre
ID: 528095 • Letter: M
Question
Mn^2+ + 2e^- rightarrow Mn E degree = -1.03 V Cu^2+ + 2e^- rightarrow Cu E degree = +0.34 V Cr_2O^2_7 + 14H^+ + 6e^- rightarrow 2Cr^3+ + 7H_2O E degree +1.33 V On the basis of the fore going standard electrode potentials, determine which of the following is the strongest reducing agent. Mn^2+ Mn Cu Cr_2O^2_7 The equilibrium expression for K_c for the system CaSO_3(s) rightleftharpoons CaO(s) + SO_2(g) is: [CaO][SO_2]/[CaSO_3] [CaO][SO_2] [SO_2] 1/[SO_2] [CaSO_3]/[CaO][SO_2] A 12.0% sucrose has a density of 1.50 g/cm^3. The number that gives the best value for the mass of sugar in 55 mL of this solution is 6.6 g. 6.60 g. 6.9 g. 6.93 g. 58 g. 12 The half-life of phosphorus- 33 is 25 days. How much of a 128-g sample will remain after 150 days? a. 16g b. 8g c. 4g d. 2g e. 1g 13 A catalyst speeds up a chemical reaction by a. changing the stoichiometry. b. increasing the activation energy. C. providing an alternate reaction mechanism. d. shifting the equilibrium. e. increasing the reaction enthalpy.Explanation / Answer
9.The strongest reducing agent is the one having lower reduction potential value.
In the given three Mn2+/Mn is having lower reduction potential value so it is strong reducing agent.
Therefore option (a) is correct
10.Option (c) is correct.